1 /*

     2  * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    24 

    25 #ifndef SHARE_VM_LEAKPROFILER_CHECKPOINT_OBJECTSAMPLEDESCRIPTION_HPP

    26 #define SHARE_VM_LEAKPROFILER_CHECKPOINT_OBJECTSAMPLEDESCRIPTION_HPP

    27 

    28 #define OBJECT_SAMPLE_DESCRIPTION_BUFFER_SIZE 100

    29 

    30 #include "memory/allocation.hpp"

    31 

    32 class outputStream;

    33 

    34 class ObjectDescriptionBuilder : public StackObj {

    35 private:

    36   char _buffer[OBJECT_SAMPLE_DESCRIPTION_BUFFER_SIZE];

    37   size_t _index;

    38 

    39 public:

    40   ObjectDescriptionBuilder();

    41 

    42   void write_text(const char* text);

    43   void write_int(jint value);

    44   void reset();

    45 

    46   void print_description(outputStream* out);

    47   const char* description();

    48 };

    49 

    50 class ObjectSampleDescription : public StackObj {

    51 private:

    52   ObjectDescriptionBuilder _description;

    53   oop _object;

    54 

    55   void write_text(const char* text);

    56   void write_int(jint value);

    57 

    58   void write_object_details();

    59   void write_size(jint size);

    60   void write_thread_name();

    61   void write_thread_group_name();

    62   void write_class_name();

    63   void write_object_to_buffer();

    64   bool is_class(Symbol* s1, const char* s2);

    65   void ensure_initialized();

    66   bool read_int_size(jint* result);

    67 

    68 public:

    69   ObjectSampleDescription(oop object);

    70   void print_description(outputStream* out);

    71   const char* description();

    72 };

    73 

    74 #endif // SHARE_VM_LEAKPROFILER_CHECKPOINT_OBJECTSAMPLEDESCRIPTION_HPP